/*
* INSANE - Interactive Structural Analysis Environment
*
* Copyright (C) 2003-2005
* Universidade Federal de Minas Gerais
* Escola de Engenharia
* Departamento de Engenharia de Estruturas
* 
* Author's email :    insane@dees.ufmg.br
* Author's website :  http://www.dees.ufmg.br/insane
* 
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or any later version.
* 
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
* 
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
package br.ufmg.dees.insane.ui.rich.postp.postp_view.command;

import java.awt.Toolkit;
import java.io.File;
import java.io.FileInputStream;
import java.io.ObjectInputStream;

import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

import br.ufmg.dees.insane.commons.command.Command;
import br.ufmg.dees.insane.commons.view.ExtensionFileFilter;
import br.ufmg.dees.insane.commons.view.ModelList;
import br.ufmg.dees.insane.model.postp.PostpModel;
import br.ufmg.dees.insane.model.postp.StepPostp;
import br.ufmg.dees.insane.ui.rich.postp.postp_view.DesktopPostp;
import br.ufmg.dees.insane.ui.rich.postp.postp_view.InterfacePostp;
import br.ufmg.dees.insane.xyplot.xyplot_model.XYPlot;
import br.ufmg.dees.insane.xyplot.xyplot_view.InterfaceXYPlot;

/**
 * This class is an implementation of the interface Command.
 * It's unabled to undo or redo.
 * Its "execute" opens a stored model calling
 * a file chooser to get the file.
 *
 * @author Penna, Samuel Fonseca, Flavio & Pitangueira, Roque
 * @since 04/07/2006
 * @see gui.command.Command
 */
public class OpenCommand implements Command {
    
    private DesktopPostp parent;
    private JFileChooser fileChooser = new JFileChooser();
    private ExtensionFileFilter filter = new ExtensionFileFilter("ipp", "INSANE-POSTP Files");
    private boolean validFile;
	
//*****************************************************************************
	
    /**
     * Creates new OpenCommand
     * and sets the FileFilter do FileChooser.
     *
     * @param parent The JFrame parent.
     */
    public OpenCommand(JFrame parent) {
        this.parent = (DesktopPostp)parent;
        fileChooser.setFileFilter(filter);
    }
    
//*****************************************************************************
	
    /**
     * Calls the file chooser and opens a stored model.
     *
     * @see gui.command.Command#execute()
     */
    public void execute() {
    		validFile = false;
			while (!validFile) {
				
				int retVal = fileChooser.showOpenDialog(parent);
				if (retVal == JFileChooser.APPROVE_OPTION) {
					//Checks if the file exists and is readable
					File file = fileChooser.getSelectedFile();
					if (file.exists() && file.isFile() && file.canRead()){
						validFile = true;
					}
					else {
						JOptionPane.showMessageDialog(parent, "File \"" + fileChooser.getSelectedFile().getPath() + "\" doesn't exist.", "Error Message", JOptionPane.ERROR_MESSAGE);
					}
				}
				else return;
			}
			
			Object objAux = new Object();
			try{
				ObjectInputStream stream = new ObjectInputStream(new FileInputStream(fileChooser.getSelectedFile()));
				objAux = stream.readObject();
			}catch (Exception exc) {
				Toolkit.getDefaultToolkit().beep();
				JOptionPane.showMessageDialog(parent, "Couldn't open file!", "Error Message", JOptionPane.ERROR_MESSAGE);
			}
			
			this.parent.setInterface();
			
			if(objAux instanceof PostpModel){
				PostpModel postpModel = (PostpModel)objAux;
				postpModel.setLabel(fileChooser.getSelectedFile().getName().replaceAll(".ipp",""));
				
				if(((ModelList)this.parent.getModelList()).getModelList().containsKey(postpModel.getLabel())){
					
					((ModelList)this.parent.getModelList()).removeModel(postpModel.getLabel());
				 	((ModelList)this.parent.getModelList()).putModel(postpModel.getLabel(),postpModel);
					InterfacePostp intFrame = new InterfacePostp();
				 	intFrame.validate();
				 	intFrame.setPostpModel(postpModel);
				 	intFrame.setModel((StepPostp)postpModel.getStepList().get(0));
				 	intFrame.setTitle(postpModel.getLabel());
				 	(this.parent).addInternalFrame(intFrame);
				 	intFrame.toFront();
				
				 //	String message = "A model with same name was found and overrided!"; 
				//	JOptionPane.showMessageDialog(parent, message, "Warning", JOptionPane.INFORMATION_MESSAGE);
			
				}else{
					postpModel.setLabel(fileChooser.getSelectedFile().getName().replaceAll(".ipp",""));
				 	((ModelList)this.parent.getModelList()).putModel(postpModel.getLabel(),postpModel);
					InterfacePostp intFrame = new InterfacePostp();
				 	intFrame.validate();
				 	intFrame.setPostpModel(postpModel);
				 	intFrame.setModel((StepPostp)postpModel.getStepList().get(0));
				 	intFrame.setTitle(postpModel.getLabel());
				 	(this.parent).addInternalFrame(intFrame);
				 	intFrame.toFront();
				}
			 	
				}else if(objAux instanceof XYPlot){
					XYPlot xyPlot = (XYPlot)objAux;
					InterfaceXYPlot intFrame = new InterfaceXYPlot();
					intFrame.validate();
					intFrame.setModel(xyPlot);
					intFrame.setTitle(xyPlot.getTitle());
					(this.parent).addInternalFrame(intFrame);
					intFrame.toFront();
				}
			this.parent.setInterface();
	}
            
//*****************************************************************************
	
    /**
     * Impossible to undo - not implemented.
     */
    public void undo() {}
    
    /**
     * Impossible to redo - not implemented.
     */
    public void redo() {}
    
//*****************************************************************************
}//end of this class

